Eyelash extensions are semi-permanent fibers that are individually attached to each natural eyelash to enhance the length, curl, fullness, and thickness of the lashes. They are typically made from synthetic materials like silk, mink, or synthetic polyester. The process involves a trained technician meticulously applying the extensions using a special adhesive, ensuring they blend seamlessly with the natural lashes. Eyelash extensions can last several weeks with proper care and maintenance, offering a convenient way to achieve a voluminous and glamorous look without the need for mascara or eyelash curlers.